US2423537A - Fire detecting cable - Google Patents
Fire detecting cable Download PDFInfo
- Publication number
- US2423537A US2423537A US478152A US47815243A US2423537A US 2423537 A US2423537 A US 2423537A US 478152 A US478152 A US 478152A US 47815243 A US47815243 A US 47815243A US 2423537 A US2423537 A US 2423537A
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- Prior art keywords
- conductor
- conductors
- insulation
- cable
- fire detecting
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
Definitions
- Figure 1 is a fragmentary view of a cable in accordance with my invention and in association with an electrically energized signal.
- Figure 2 is an enlarged sectional view along the line 2-2 of Fi ure 1.
- Figure 3 is a perspective view of a conductor ;for illustration, Figure 1 illustrates a conductor wire 36 enclosed in a second conductor i2 and separated therefrom by insulation 46.
- the insulation 46 is in the nature of a ribbon wrapped spirally about the wire 36 and the conductor I2 is of ribbon like contour and spirally wound over the insulation 46 but in a reverse direction.
- Both conductors 36 and i2 are of fusibie'alloy which fuses at a relatively low temperature. Such materials are well known in the art.
- Asignal such as a conventional electric bell embodying a bell i6 and the common electromagnetic operating mechanism in a housing i8, has one terminal connected through a wire 20 with the center conductor wire 36 and the other terminal connected, through a wire 22 with the exterior ribbon like conductor i2.
- a source of electric current, such as a battery, 24 is interposed in the wire 22.
- the insulation is wrapped with its convolution so spaced as to provide ample clearance for fused material from either conductor to flow into contact with the other.
- the convolutions of the metal tape constituting the conductor l 2 are close wound so that this conductor constitutes, a housing for the insulation 46. This insulation may be cemented to the conductor 36, if desired.
- a thin body or strip 28 of noncorroding material which fuses at a low temperature. This strip acts as a protector which provides better contact between the fused conductors 36 and I2,
- a fabric wrapper or braid 30 is applied over the conductor i2.
- the cable structure 26 In wrapping the conductor l2 about the insulated conductor 36, the cable structure 26 comprises a unit line of relatively small proportions, one of which eliminates necessity of insulating and connecting as a unit two parallel conductors.
- the cable structure is easy to handle and may be rolled without harm to the line.
- the conductor 36 is provided with a ribbon 38 of spirally wound insulation.
- a mev tallic sleeve 40 of braided wire encloses the insulation 38, the conductor 36 and the sleeve 40 corresponding to the conductors iii and i2, re-
- Figure 5 diilers from that of Figure 6' only in that a protective sleeve 42 is applied over the conductor sleeve 40.
- the conductors 36 and 40 are.also fusible at low temperatures.
- the conductor 44 is enclosed in a covering 46 of insulating material in the nature of a ribbon close wound spirally about the conductor.
- the ribbon is perforated at 48 to allow fused material from the two conductors to make contact.
- the conductor 50 is enclosed in a braided insulating ribbon 52 wound spirally thereon.
- This braid is sufilciently open to permit free passage of fused material.
- the covering 30 of Figure 1 may constitute fabric or metal wire.
- a wire covering affords protectlon against gnawing animals. Obviously all the cable devices may be enclosed in such a protective covering, with insulation provided wherever necessary. All the forms are identical with respect to the compact arrangement of the parts when considered in cross section.
- a cable of the type described comprising first and second conductors each of material for, and said insulation being provided with interstices through which fusion of the conductors will make contact therebetween.
- said conductor 4 provided with interstices forming separated pockets, supporting the conductors in normally noncontacting relationship; said conductors being formed of material which is fusible at relatively 5 low temperature, the insulating spacing means provided with open areas between the two spaced conductors through which the fused material of the conductors may pass to make contactwhen the fusion point in temperature of the conductors is reached.
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- Insulated Conductors (AREA)
Description
y 947. D. R. WHEELER 2,423,537
FIRE DETECTING CABLE Filed March 5, 19-43 JOC'AZ Y 1101 66 Z62" INVENTOR.
AYTORNKYI Patented July 8, 1947 uNnao STATES PATENT ornca FIRE DETECTING CABLE Dock R. Wheeler, Shreveport, La.
Application March 5, 1943, Serial No. 478,152
Claims.
My invention relates to electric circuits, and has. among its objects and advantages the provision of an improved fire detecting cable which =may be produced at a low cost, folded and easily handled without damage, and in which the cable structureis such as to provide a relatively compact construction.
In the accompanying drawings:
Figure 1 is a fragmentary view of a cable in accordance with my invention and in association with an electrically energized signal.
Figure 2 is an enlarged sectional view along the line 2-2 of Fi ure 1.
Figure 3 is a perspective view of a conductor ;for illustration, Figure 1 illustrates a conductor wire 36 enclosed in a second conductor i2 and separated therefrom by insulation 46. The insulation 46 is in the nature of a ribbon wrapped spirally about the wire 36 and the conductor I2 is of ribbon like contour and spirally wound over the insulation 46 but in a reverse direction. Both conductors 36 and i2 are of fusibie'alloy which fuses at a relatively low temperature. Such materials are well known in the art.
Asignal, such as a conventional electric bell embodying a bell i6 and the common electromagnetic operating mechanism in a housing i8, has one terminal connected through a wire 20 with the center conductor wire 36 and the other terminal connected, through a wire 22 with the exterior ribbon like conductor i2. A source of electric current, such as a battery, 24 is interposed in the wire 22. Thus, when the cable is in normal and proper condition the circuit through the bell remains open but when the cable is subjected to an abnormal condition so as to cause fusion, of the exterior conductor i2 and effect contact between the same and the inner conductor wire 36 the circuit is closed and the bell is caused to ring and indicate such fusion. The insulation is wrapped with its convolution so spaced as to provide ample clearance for fused material from either conductor to flow into contact with the other. The convolutions of the metal tape constituting the conductor l 2 are close wound so that this conductor constitutes, a housing for the insulation 46. This insulation may be cemented to the conductor 36, if desired.
On the inner face .of the conductor 12 is applied a thin body or strip 28 of noncorroding material which fuses at a low temperature. This strip acts as a protector which provides better contact between the fused conductors 36 and I2,
particularly in cases where thesetwo conductors might become corroded after a period of years. A fabric wrapper or braid 30 is applied over the conductor i2.
In wrapping the conductor l2 about the insulated conductor 36, the cable structure 26 comprises a unit line of relatively small proportions, one of which eliminates necessity of insulating and connecting as a unit two parallel conductors. The cable structure is easy to handle and may be rolled without harm to the line.
In Figure 4, the conductor 36 is provided with a ribbon 38 of spirally wound insulation. A mev tallic sleeve 40 of braided wire encloses the insulation 38, the conductor 36 and the sleeve 40 corresponding to the conductors iii and i2, re-
spectively.
The construction of Figure 5 diilers from that of Figure 6' only in that a protective sleeve 42 is applied over the conductor sleeve 40. The conductors 36 and 40 are.also fusible at low temperatures.
In Figure 6, the conductor 44 is enclosed in a covering 46 of insulating material in the nature of a ribbon close wound spirally about the conductor. The ribbon is perforated at 48 to allow fused material from the two conductors to make contact.
In Figure 7, the conductor 50 is enclosed in a braided insulating ribbon 52 wound spirally thereon. This braid is sufilciently open to permit free passage of fused material.
The covering 30 of Figure 1 may constitute fabric or metal wire. A wire covering affords protectlon against gnawing animals. Obviously all the cable devices may be enclosed in such a protective covering, with insulation provided wherever necessary. All the forms are identical with respect to the compact arrangement of the parts when considered in cross section.
Without further elaboration, the foregoing will so fully explain my invention, that others may, by applying current knowledge, readily adapt the same for use under various conditions of service.
I claim:
1. A cable of the type described comprising first and second conductors each of material for, and said insulation being provided with interstices through which fusion of the conductors will make contact therebetween.
2. The invention as in claim 1 wherein a noncorroding strip which fuses at'low temperature is provided on said second conductor.
3. The invention as in claim 1 wherein a protective noncorroding strip which fuses at low temperature is provided onsaid second conductor adjacent said insulation.
4. In a cable ofthe character described, an
inner conductor, insulation on said conductor, an outer conductor wound spirally on said insulation, and a strip of noncorroding material fusible at a relatively low temperature secured to the inner face of the spirally wound conductor, said insulation being provided with'interstices disposed to provide spacing-whereby fusing of the noncorroding and fusiblestrip will effect electrical connection between the inner and outer- N conductors.
5. In a cable of-the character described, an
inner conductor, an outer conductor, and insulating spacing meansbetween said conductor 4 provided with interstices forming separated pockets, supporting the conductors in normally noncontacting relationship; said conductors being formed of material which is fusible at relatively 5 low temperature, the insulating spacing means provided with open areas between the two spaced conductors through which the fused material of the conductors may pass to make contactwhen the fusion point in temperature of the conductors is reached.
DOCK R. WHEELER.
REFERENCES CITED The following references are of record in the file of this patent:
UNITED STATES PATENTS Number Name Date 1,235,028 Harsch July 31, 1917 1,283,260 Montgomery Oct. 29, 1918 1,779,610 Lyndon Oct. 28, 1930 1 2,048,271 Lindsey July 21. 1936 1,129,358 Mitchell Feb. 23, 1915 V 1,608,18 Rumble Nov. 23. 1926 1,738,828 Jackson Dec. 10, 1929 1,962,041 Spong June 5, 1934 2,161,395 Wheeler June 6, 1939 FOREIGN PATENTS V Number Country Date France June 15, 1925
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US478152A US2423537A (en) | 1943-03-05 | 1943-03-05 | Fire detecting cable |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US478152A US2423537A (en) | 1943-03-05 | 1943-03-05 | Fire detecting cable |
Publications (1)
Publication Number | Publication Date |
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US2423537A true US2423537A (en) | 1947-07-08 |
Family
ID=23898753
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US478152A Expired - Lifetime US2423537A (en) | 1943-03-05 | 1943-03-05 | Fire detecting cable |
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Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2581213A (en) * | 1949-12-15 | 1952-01-01 | Gen Electric | Temperature responsive signaling and locating system |
US2670419A (en) * | 1950-05-29 | 1954-02-23 | Honeywell Regulator Co | Fire alarm tape |
US2691698A (en) * | 1950-10-26 | 1954-10-12 | Res Products Inc | Security telephone cable with jammer and alarm |
DE958945C (en) * | 1949-05-04 | 1957-02-28 | Gen Electric | Flexible, wire-like, temperature-sensitive element with a device for continuous monitoring or control of an electrical circuit |
DE1053689B (en) * | 1949-05-04 | 1959-03-26 | Gen Electric | Flexible, wire-like, temperature-sensitive element |
DE1059062B (en) * | 1955-05-25 | 1959-06-11 | Telegraph Constr & Maintenance | Telecommunication cable in a waterproof jacket with plastic-insulated cores or groups of cores and a protective conductor for fault monitoring |
Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1129358A (en) * | 1911-09-09 | 1915-02-23 | Nat Standard Co | Lightning-conductor. |
US1235028A (en) * | 1916-12-27 | 1917-07-31 | William H Garrison | Fire-detecting wire. |
US1283260A (en) * | 1917-02-21 | 1918-10-29 | Herbert D Montgomery | Thermostat. |
FR590344A (en) * | 1924-12-13 | 1925-06-15 | Const Electr De Lyon Et Du Dau | Fuses for low electric current |
US1608184A (en) * | 1924-05-22 | 1926-11-23 | Alex C Rumble | Bonding and spacing clamp |
US1738828A (en) * | 1925-03-02 | 1929-12-10 | Jackson Arthur Hews | Low-resistance permanent wire |
US1779610A (en) * | 1927-05-18 | 1930-10-28 | Lyndon Edward | Fire-detecting cable |
US1962041A (en) * | 1931-03-03 | 1934-06-05 | Spong James William | Construction of aerial or earth device for wireless apparatus |
US2048271A (en) * | 1929-04-05 | 1936-07-21 | Garrison Fire Detecting System | Cable and method of producing same |
US2161395A (en) * | 1937-10-13 | 1939-06-06 | Dock R Wheeler | Fire detecting cable |
-
1943
- 1943-03-05 US US478152A patent/US2423537A/en not_active Expired - Lifetime
Patent Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1129358A (en) * | 1911-09-09 | 1915-02-23 | Nat Standard Co | Lightning-conductor. |
US1235028A (en) * | 1916-12-27 | 1917-07-31 | William H Garrison | Fire-detecting wire. |
US1283260A (en) * | 1917-02-21 | 1918-10-29 | Herbert D Montgomery | Thermostat. |
US1608184A (en) * | 1924-05-22 | 1926-11-23 | Alex C Rumble | Bonding and spacing clamp |
FR590344A (en) * | 1924-12-13 | 1925-06-15 | Const Electr De Lyon Et Du Dau | Fuses for low electric current |
US1738828A (en) * | 1925-03-02 | 1929-12-10 | Jackson Arthur Hews | Low-resistance permanent wire |
US1779610A (en) * | 1927-05-18 | 1930-10-28 | Lyndon Edward | Fire-detecting cable |
US2048271A (en) * | 1929-04-05 | 1936-07-21 | Garrison Fire Detecting System | Cable and method of producing same |
US1962041A (en) * | 1931-03-03 | 1934-06-05 | Spong James William | Construction of aerial or earth device for wireless apparatus |
US2161395A (en) * | 1937-10-13 | 1939-06-06 | Dock R Wheeler | Fire detecting cable |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE958945C (en) * | 1949-05-04 | 1957-02-28 | Gen Electric | Flexible, wire-like, temperature-sensitive element with a device for continuous monitoring or control of an electrical circuit |
DE1053689B (en) * | 1949-05-04 | 1959-03-26 | Gen Electric | Flexible, wire-like, temperature-sensitive element |
US2581213A (en) * | 1949-12-15 | 1952-01-01 | Gen Electric | Temperature responsive signaling and locating system |
US2670419A (en) * | 1950-05-29 | 1954-02-23 | Honeywell Regulator Co | Fire alarm tape |
US2691698A (en) * | 1950-10-26 | 1954-10-12 | Res Products Inc | Security telephone cable with jammer and alarm |
DE1059062B (en) * | 1955-05-25 | 1959-06-11 | Telegraph Constr & Maintenance | Telecommunication cable in a waterproof jacket with plastic-insulated cores or groups of cores and a protective conductor for fault monitoring |
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